ISO 3354:1975
Measurement of clean water flow in closed conduits — Velocity-area method using current-meters
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6.2 Devices for improving flow conditions
6.3 Calibration of the current-meter
6.4 Limits of use
6.5 Inspection and maintenance of current-meters
7 Setting of current-meters into the conduit
7.1 Setting of current-meters
7.2 Mounting in a circular cross-section
7.3 Mounting in a rectangular cross-section
velocity area
8.1 Circular cross-sections
8.2 Rectangular cross-sections
velocity area
9.1 Circular cross-sections
9.2 Rectangular cross-sections
10 Determination of the discharge velocity by arithmetical methods
10.1 "Log-linear" method
10.2 "Log-Tchebycheff" method
11.4 Definition of the standard deviation
11.5 Definition of the uncertainty
11.6 Calculation of the standard deviation
A : Corrections for blockage effect
mounting rod
and numerical methods
D : Determination of coefficient m for extrapolation near the wall
means of current-meters
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6.2 Devices for improving flow conditions
6.3 Calibration of the current-meter
6.4 Limits of use
6.5 Inspection and maintenance of current-meters
7 Setting of current-meters into the conduit
7.1 Setting of current-meters
7.2 Mounting in a circular cross-section
7.3 Mounting in a rectangular cross-section
velocity area
8.1 Circular cross-sections
8.2 Rectangular cross-sections
velocity area
9.1 Circular cross-sections
9.2 Rectangular cross-sections
10 Determination of the discharge velocity by arithmetical methods
10.1 "Log-linear" method
10.2 "Log-Tchebycheff" method
11.4 Definition of the standard deviation
11.5 Definition of the uncertainty
11.6 Calculation of the standard deviation
A : Corrections for blockage effect
mounting rod
and numerical methods
D : Determination of coefficient m for extrapolation near the wall
means of current-meters